Historically which AoE2 civ was the most moral/righteous in general

None of the medieval civs were spotless with war, plunder and slavery being the norm. But it general what case can you make for the nicest civ?

I know there are differences with different time periods and different rulers but in general

For example

The Goths did a very "restrained" sack of Rome in the 400s. With the population largely left alive and limited damage to buildings.

Slavery was abolished in England in the 1000s. Though serfdom was present.

The Celts might have treated their slaves better with opportunities for rising in the social ranks

Saracen slave warrior mameluks being a respected class and also ruling at one point after a rebellion i think. Not to sure on that one.

I want to choose my main civ on whos the nicest. I like the mesos in game but I cant reconcile them with what I know about them irl. For exampme the 'garland wars' tech always rubbed me the wrong way knowing they were off to get slaves to be mutialated and killed in sacrifices.

Same with the Spanish. Was maining them but could never look at the conqs the same way when i read about their atrocities. Or even the Spanish and Germand atrocities in the 1527 sacking of Rome